We are a manufacturing company who produces silicon rubber wristband with negative ions. The wristband emits negative ions between 1300 to 1800. Our ADVANTAGE over the other suppliers and manufacturers: We have a sister company who does the 3rd party Quality Control Inspection. Your order is checked and verified if the wristband contains the required negative ions during the manufacturing and before the shipment is made. Inspection Reports shall be submitted to buyer for their satisfaction. You can send us your wristband design and we can make the sample for you before we start the manufacturing of the order. For other inquiry please contact as with our email